1257374984 has 8 divisors (see below), whose sum is σ = 2357578110. Its totient is φ = 628687488.

The previous prime is 1257374983. The next prime is 1257374999. The reversal of 1257374984 is 4894737521.

It can be written as a sum of positive squares in only one way, i.e., 1254718084 + 2656900 = 35422^2 + 1630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1257374983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78585929 + ... + 78585944.

Almost surely, 2^1257374984 is an apocalyptic number.

It is an amenable number.

1257374984 is a deficient number, since it is larger than the sum of its proper divisors (1100203126).

1257374984 is a wasteful number, since it uses less digits than its factorization.

1257374984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157171879 (or 157171875 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 1257374984 is about 35459.4836961849. The cubic root of 1257374984 is about 1079.3317150489.

The spelling of 1257374984 in words is "one billion, two hundred fifty-seven million, three hundred seventy-four thousand, nine hundred eighty-four".